diff --git a/evm/src/generation/mod.rs b/evm/src/generation/mod.rs
index 72a0dca9..9c1b6c2b 100644
--- a/evm/src/generation/mod.rs
+++ b/evm/src/generation/mod.rs
@@ -1,4 +1,4 @@
-use std::collections::{BTreeSet, HashMap, HashMap, HashSet};
+use std::collections::{BTreeSet, HashMap};
 use std::sync::atomic::AtomicBool;
 use std::sync::Arc;
 
diff --git a/evm/src/util.rs b/evm/src/util.rs
index fa19ef09..ee2d9607 100644
--- a/evm/src/util.rs
+++ b/evm/src/util.rs
@@ -80,11 +80,6 @@ pub(crate) fn u256_to_usize(u256: U256) -> Result<usize, ProgramError> {
     u256.try_into().map_err(|_| ProgramError::IntegerTooLarge)
 }
 
-/// Converts a `U256` to a `u8`, erroring in case of overlow instead of panicking.
-pub(crate) fn u256_to_u8(u256: U256) -> Result<u8, ProgramError> {
-    u256.try_into().map_err(|_| ProgramError::IntegerTooLarge)
-}
-
 /// Converts a `U256` to a `bool`, erroring in case of overlow instead of panicking.
 pub(crate) fn u256_to_bool(u256: U256) -> Result<bool, ProgramError> {
     if u256 == U256::zero() {